JP2015167557A - Net-lifting device of purse seine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems in a conventional net-lifting device installed in the upper part of a side roller in which a net-supporting type roller is mainly used, and a net-lifting force greatly decreases when a large load is applied in the net-lifting, and thereby a net-lifting machine for winding the net around the roller and pulling the net is usually mounted separately from the supporting type roller.SOLUTION: A net-lifting device is installed in the upper part of a side roller provided at the hull ship's side part and elevation-pivotally provided. The net-lifting device is pressure-releasably mounted with: a traction roller capable of being driven and rotated by a hydraulic motor mounted rearward, and slightly provided with a taper toward the tip direction; and a supporting roller capable of being driven and rotated similarly by the hydraulic motor. In the traction of a mini-load, the net is supported between the traction roller and the supporting roller and pulled, and the net wound in the traction roller is suppressed by the supporting roller in the heavy load, and thereby a traction force is greatly increased and the net-lifting by multiple traction methods is made possible by a single body.

Description

  The present invention relates to a lifting net device used when a fishing net is lifted in a lathe fishing boat.

  More specifically, the present invention relates to a lifting net device that is installed at the upper rear portion of a side roller provided on the side of the hull and performs a lifting net.

  In the fishing haul fishery, nets thrown into the sea to catch fish are rolled around immediately after the throwing net, and the bottom of the net is closed. It is generally lifted on the deck from the stern part by the lifting net and the netting roller, and depending on the shape of the net ship, from the side part.

    In parallel with this work, the net of the part where the fish was trapped was lifted from the side of the ship side by using a side roller installed on the side of the hull, and the net was gradually squeezed to cover the escape area. I'll trap the fish.

  The net that is usually lifted into the ship from the sea is a net-rolling roller that is first pulled sequentially from the sea by a large lifting net installed at the stern, such as a net holer, and then suspended on a derrick boom or marine crane. It is towed to a very high position and then dropped from that position onto the screen.

  Apart from this work, in order to catch the fish trapped in the net, the work of lifting the net from the net bottom to the fish catching section with a side roller or the like provided on the hull side also proceeds simultaneously.

  Furthermore, in order to cope with the lifting work of the bottom net from the heel side where a heavy load is applied, a net-clamping type or netting type lifting net device is provided at the upper rear of the side roller, and the lifting net is driven by the power of the machine. It is general to proceed.

  When raising the net, there is a concern that if the fish caught in the air rush to the bottom in search of a refuge or be swept away by the tide, it will cause an even greater burden on the workers. Due to the influence, the lifting net from the heel side was delayed, causing fish to bite and damage the fish body.

  In addition, the underwater nets that contain a large amount of fish are very heavy, so when the nets in hand are swung in sync with the rocking of the ship, the workers are dragged or sometimes blown off by the bounce. It was very dangerous work.

  In order to solve this problem, a net-clamping type lifting net device and a hull-fixing type net-rolling type roller have been developed and installed together.When the load is small, the net is clamped and pulled, and the load is reduced. When it was large, it was able to cope with the load change during lifting by rolling up the net with a roller, but there was a drawback that it could not be used in the opposite case, and there was a need to eliminate it.

  The present invention modifies the conventional net-clamping type lifting net device that has been used so far and the method of installing a net-wiping roller fixed to the hull, and can independently achieve the same effect as the conventional net-lifting device. Is to provide.

  In other words, when lifting a light load, the net is clamped and pulled in the same way as the net-cage type lifting net device, and when a heavy load is applied to the net, the net is pulled and pulled in the same way as the net-rolling roller. By enabling the work and having the advantages of the conventional lifting net device, it solves the problem of load change at the time of lifting net.

  This makes it possible to improve the efficiency of the lifting net by adjusting the net pulling method according to the conditions during lifting.

  By using the lifting net device according to the present invention, the traction method can be changed according to the change in the net load, and the labor of the operator can be reduced by towing the net quickly and strongly with only one type of mechanical force. I can do it.

  As described above, the present lifting net device can carry out the conventional lifting net operation which has been performed by two types of lifting net devices with only one unit, and is extremely useful.

  In addition, since the work conventionally performed by a plurality of workers using a plurality of devices can be performed rationally and efficiently, the work burden can be reduced.

  Furthermore, the lifting net device according to the present invention enables a smooth and speedy progress of the lifting net work, and can greatly contribute to the lifting net work of the turning net that requires speed and safety.

  The present invention has the following structure as the best method for carrying out the invention.

  A clevis bracket is provided at the bottom of the swivel that is pivotable by the rotation of the hydraulic motor.

  A roller base having a bearing at the rear and a lifting bearing at the center and a clevis fitting of the swivel are attached so as to be rotatable around the lifting shaft.

  A hydraulic cylinder is attached to the rear of the roller base, and the roller base is provided so as to be able to be lifted up and down in the direction of arrows A-A ′ by expanding and contracting the hydraulic cylinder.

  At the lower part of the roller base, a traction roller having a long roller having a slight taper toward the tip is mounted on a drive shaft that is rotatably provided by a hydraulic motor.

  A clamping arm is provided at the front upper part of the roller base so as to be pivotable about a shaft, and a clamping arm is provided at an arrow B-B ′ so as to be opened and closed by a hydraulic cylinder attached above.

  The holding arm is equipped with a roller bracket, and a drive shaft provided rotatably by a hydraulic motor is attached with a short roller having a slight taper toward the tip and a shorter length than the traction roller. Install the roller.

  When the load is light, a net is sandwiched between the pulling roller and the pinching roller, and the net can be pulled by the rotational force of the hydraulic motor.

  A net is wound around a pulling roller at a heavy load, and the net wound around a pinching roller is pressed so that the net can be pulled by a pulling force of a hydraulic motor.

  Front view of the present invention   Side view of the present invention   Explanatory drawing of lifting net device according to the present invention   Opening and closing explanatory diagram of the lifting net device according to the present invention   Illustration of net pulling condition at light load   Illustration of net pulling condition under heavy load   Illustration when using

    A clevis fitting 5 having a bearing 4 is provided at a lower portion of a swivel base 3 which is formed so as to be attachable to a boom 1 fixed to a hull 101 and is turnable by rotation of a hydraulic motor 2.

  A roller base 8 provided with a bearing 6 at the rear and a lift bearing 7 at the center is mounted so that the lift bearing 7 and the clevis bracket 5 of the swivel base 3 can be rotated by the lift shaft 9.

  A hydraulic cylinder 10 is attached to the bearing 4 at the back of the roller base 8, a rod fitting 11 of the cylinder 10 is attached to the bearing 4 of the clevis fitting 5 with a shaft 12, and the roller base 8 is moved by the arrow AA by the expansion and contraction of the hydraulic cylinder 10. ′ Is provided so as to be rotatable.

  At the lower part of the roller base 8, a traction roller device 14 provided so as to be rotatable by a case rotating hydraulic motor 13 is attached.

  The pulling roller device 14 is provided with a pulling roller 16 formed of a long roller formed of a rubber-like elastic body having a cylindrical rear end and a slight taper toward the front end in front of the drive shaft 15.

  A bearing 17 is provided at the front upper part of the roller table 8, and a holding arm 18 is rotatably provided on the side surface by a shaft 19, and a hydraulic cylinder 20 attached above is connected to the bearing 17 at the upper part of the roller table 8, By extending and contracting the cylinder 20, the holding arm 18 is provided so as to be rotatable in the direction of the arrow BB ′.

  A clamping roller fixing bracket 21 is attached to the clamping arm 18, and a clamping roller device 22 that is rotatably provided by a case rotating hydraulic motor is attached to the roller bracket 21.

  A clamping roller 24 formed of a rubber-like elastic body having a cylindrical rear end and a slight taper toward the tip is attached to the clamping roller device 22 in front of the drive shaft 23.

  The pinching roller 24 is provided in the same shape as the traction roller 16, but the length of the roller is shorter than that of the traction roller 16.

  Protective frames 25 and 26 for ensuring safety are attached to the roller devices 14 and 22, respectively.

  When lifting the net with the main lifting net device 102 installed at several locations on the side of the hull 101 during the lifting net, if the load applied to the net 103 is small, the roller base of the main lifting net device 102 is rotated in the direction of arrow A. The net 103 is pinched between the pulling roller 16 and the pinching roller 24 and the pulling net is pulled in the direction of the arrow C. However, when the load increases, the net slips and cannot be lifted.

  In the past, it took time and effort to rewind the net 103 on a separate roller that was separately installed at this time, and tow while pulling. However, in this lifting net device 102, the roller base 8 is rotated in the direction of arrow A to be horizontal. The net 103 is wound around the pulling roller 16 in the direction of the arrow D from the outside, and the pinching roller 24 is used as a pressing roller, so that a strong pulling force can be exerted to lift the net.

  Note that the hydraulic circuit in the present invention is not shown.

DESCRIPTION OF SYMBOLS 1 Boom 2 Hydraulic motor 3 Swivel base 4 Bearing 5 Clevis bracket 6 Bearing 7 Lifting bearing 8 Roller base 9 Lifting shaft 10 Hydraulic cylinder 11 Rod bracket 12 Shaft 13 Hydraulic motor 14 Traction roller device 15 Drive shaft 16 Traction roller 17 Bearing 18 Nipping arm 19 Axis 20 Hydraulic Cylinder 21 Roller Fitting 22 Clamping Roller Device 23 Drive Shaft 24 Clamping Roller 25 Protective Frame 26 Protective Frame 101 Hull 102 Lifting Net Device 103 Net

Claims (1)

In the lifting net device installed above the side roller provided on the side of the hull and provided so as to be able to turn up and down,
A pulling roller with a long roller that can be driven and rotated by the attached hydraulic motor and slightly tapered toward the tip, and a drive roller that can be driven and rotated by the attached hydraulic motor and slightly tapered toward the tip A squeezing roller with a short roller provided with a squeezable roller is attached so that it can be pressed and released. It is possible to greatly increase the traction force by pressing the squeezing roller with a pinching roller, and the lifting net device of the lathe net is characterized by the fact that a single lifting net can be provided by a plurality of traction methods.

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